My friend has the PE770 and really likes it. It is user friendly. She has the Embrid embroidery software. Since she first learned machine embroidery on my Viking Topaz she had access to a larger hoop than her machine has, so she would like to have a larger hoop but gets by without it.
If possible, buy your machine from a dealer that has a good trade in policy. Both my Janome dealer and Viking dealer will allow you to up grade within the year for the original amount paid. Then if you really like it, and want to up grade it will be easier to do.